Damping mechanism of rotary printing-machines.



PATENTBD OCT. 25 1904.

T. M. NORTH. DAMPING MECHANISM OF ROTARY PRINTING MACHINES.

-urmormox IILBD AUG. 24. 1903. I

' 4 SHEETS-SHEET 1.

HO MODEL.

"Q Q r N 0 M6 n o \m n N Y 9" o \N .w 3 a. o a Rwfi a N a N per I PATENTED OUT. 25,-1'904. T. M. NORTH. DAMPING MECHANISM OF ROTARY PRINTING MACHINES.

APPLICATION FILED AUG. 24, 1903 4 SHEETS-SHEET 2.

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No. 773,51 PATENTED 001. 25. 1904.

T. NORTH. DAMPING MECHANISM OF ROTARY PRINTING MACHINES.

urmouxon FILED we. 24. 1903. no MODEL. 4 snark-sum s.

' PATBNTEDOGT. 25, 19.04.

v 'r. 'M. NORTH. DA'MPING MECHANISM OF ROTARY PRINTING MACHINES.

I0 MODEL.

APPLIOATION FILED AUG. 24, 1903.

my @M UNIT STATES THOMAS M. NORTH, or ALTRINCHAM, ENGLAND, ASSIGNOR TO THE 'LINOTYPE COMPANY, LIMITED, OF LONDON, ENGLAND.

-' DAMPING MECHANISM OF ROTARY PRINTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 773,516, dated October 25, 1904. Application fil d August 24, 1903. Serial No; 170,604. (No model.)

T all whom it may concern.-

ed'certain new and useful Improvements in the Damping Mechanism of Rotary Printing- Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to improvements in the damping mechanism of any rotary printing-machine that prints according to the lithographic method from any suitable surface.

It consists in the combinations hereinafter described in connection with the accompanying drawings and claimed in the respective claims.

Figure 1 is a side elevation of a printingcouple fitted with the improved damping mechanism, showing it in position to damp the printing-surface; Fig- 2, a side elevation of the said mechanism in the same position and on an enlarged scale. Fig. 3 is a plan corre-. sponding with Fig.2, but partly in section. Fig. 4 is a view similar to Fig. 2, but showing the mechanism in'its inoperative position.

1 is part of oneside frame of the printingmachine, the opposite side frame not showing in the figures; 2, the printing-cylinder; 3, its shaft turning in suitable bearings in the side frames; 4,the impression-cylinder; 5, its shaft, also turning in suitable bearings in the said side frames; 6, the gearing between the two cylinders 2 and 4, and 7 a portion of the ink ing mechanism. These seven parts are as heretofore.

8 8 8 are the vibrator-rollers of the inking mechanism, and they cooperate, as heretofore,

with the rollers 9, thatink the printing-surface lOof the printing-cylinder 2. They are journaled in fixed bearings in brackets 11, bolted to suitable brackets fast to each side frame 1, and are all rotated together by a gear "12, fast on one end of the printing-cylinder 2,

suitablestud-axles fast to thebrackets 11 on the respective side frame of the machine and The the shaft90 and just inside the respective side frame 1, as clearly shown in Fig. 3. It can therefore rock-on the shaft 90 up and down and as far in either direction as the present invention requiresthat is, into contact with the printing-surface 10, out of contact with the ink-surface 10, which is coradial with the surface 10, and far enough away from the latter to make spaceenough for the dampingrollers to be taken out.

The damping'mechanism is rocked by the following means: a v

. The checks v92 are prolonged to the front of the machine, the front ends of these prolongations carrying a transverse shaft 93, which turns in suitable bearings therein.

94 is a cam fast on the shaft 93 in proper position thereon to engage with .the cam 95 fast on the shaft 3- at the feeder side of the machine, through 96 97, the two arms of a bellcrank lever fulcrumed upon the shaft 90. The

arm 96 is in permanent contact by means of the antifriction-roller 98 in the outer end of it' with the cam 65, (excepting when the damping mechanism is down upon the stop 134, described farther on,) while the arm 97 is in permanent contact with the cam 94.

The rear part of the damping mechanism is heavier than the front by reason of its con- Y taining the damping-rollers,the water-trough, the rollers for conveying water from the trough to the damping-rollers, and nearly the Whole of the two trains of gearingthat actuate all the rollers above mentioned.

99 99- arethe two damping-rollers, each turning in the usual crutch-bearings 100, fast upon the tops of pins 101, fitting in sockets 102, fixed to the respective cheek 92 by bolts cheeks 92 92, a gear 111, fast on a short shaft 112, turning in suitable hearings in the respective cheek and engaging with the gear 118,

ie stenthespindle1140fthetreegh-reller199.

The damping-rollers 99 99 are rotated by a.

tram of gearing consisting of the gear 115, already described, a gear 116, loose on the shaft 117, rocking in' suitable hearings in the cheeks 92, a gear 118, turning on a stud-axle 119, carried by the cheek 92 on the feeder side of the machine, and a gear 120, fast on the spindle 121 of the distributer-roller 122, turning in crutch-bearings in the cheeks 92 92, and with which roller 122 the two rollers 99 99 are in constant contact.

The water is conveyed from the troughroller 106 to the distributer-roller 122 by a ductor-roller 123, the spindle 124 of which turns in suitable bearings 125 in the rear ends of arms 126, fast upon the shaft 117 above mentioned, and rocked between the said rollers 1.06 and 122 by a cam 127, combined with a drum 128, both cam and drum fast on the shaft 112, above mentioned, and a second pair of arms 129 loosely mounted upon the feeder end of the shaft 117. These two arms 129 are held together by a cross-piece 200.

201 is an abutment projecting from the cross-piece 200, and 202 a set-screw which works through an arm 203, springing from a hub 204, fast upon the shaft 117, just mentioned, and fitting loosely between the two arnes 129. The set-screw 202 is made to project more or less through the arm 203 and against the abutment 201 to adjust the position of the roller 123 between the rollers 106 and 122. The necessity for this adjustment arises out of the liability of the roller 123 (which is covered with felt) to shrink, and as the distance between the rollers 106 and 122 is constant, more throw is given to the cam 127 than would be required for the full size of the roller 123, so that when it is large the roller 130 in one of the arms 129 following the contour of its cam will take the abutment 201 away from the set-screw 202, whereupon the arm 205 on the hub 204 will contact with the set-screw 206, carried by the lug 207 on the check 92 on the feeder side of the machine.

Fig. 3 shows a helically-shaped extension 127 of the cam 127. The function of this extension is to give the roller 123 more time to rest upon the roller 106, which is desirable under certain circumstances and is exercised by moving the cam-roller 130 across the cam 127 by means of a hand-wheel and screw 130. The cam-roller 130 is shown as upon the disk 128.

The cam 95 is so proportioned that it will keep both rollers 99 in contact with the printing-surface 10; but as the ink-surface 10 is coradial with it the rollers 99 if they were not moved away would roll over it and be inked. To prevent this inking, the cam 95 is made to lift them to the printing-s11 rface 10 and drop them away from the ink-surface 10. This liftlng and lowering take place when the gaps 10 are opposite the s 1d Hllltlt. 'lhe weight 01 the reer pert e1 the (Immune meeh emsm keeps the can 94 1h eehteet eeth the arm 97 and the roller 98 on the arm 96 both of the bell-crank lever above mentioned in contact with the cam 95. Consequently when the high portion of this cam 95 is opposite the roller 98 the damping-rollers 99 are rocked into contact with the printing-surface 10, and when the drop in the said cam 95 is opposite the said roller 98 the weight of the damping mechanism rocks the rollers 99 away from the ink-surface 10. The present invention also makes use of the same weight of the damping mechanism to rock it away from the printing-cylinder 2 for a distance that will allow of the damping-rollers 99 being removed from the damping mechanism and, further, of keeping all the rollers of the latter-i. a, the trough-roller 106, the transferring-roller 123, the distributer-roller 122, and the dampingrollers 99rnnning in working contact with each other during the time that the latter are at the above-mentioned distance from the printing-cylinder 2. To allow of the weight of the rear part of the damping mechanism so rocking it, the shaft 93 has a hand-lever 131, keyed on its outer end on the feeder side of the machine. The outer or rear end of this lever 131 is normally held locked to the bellcrank lever 96 9'7 bya locking-pin 132, (shown best in Fig. 3,) sliding transversely through the said lever 131 into a socket 133, Figs. 3 and 4, in the said lever 96 97. The lever 131 is unlocked from the bell-crank lever and swung over to the front-rl a, to the right of the figuresas shown in Fig. 4, whereupon the damping mechanism is rocked until the lower portion of the cam 94 bears against the arm 97, the roller 98 on the arm 96 being then out of contact with the cam 95 to allow the mechanism to rest on the stops 134. There is one of these steps on each side frame 1 of the machine upon which a suitable foot 135 on each cheek 92 rests when the damping mechanism is at the required distance from the printing-cylinder 2, and the position of the shaft 93 and stops 134, as well as the dimensions of the bell-crank lever 96 97 and cam 94, are proportioned accordingly. \Vhen the damping mechanism is in its lowered position,

as shown in Fig. 4, the damping-rollers 99 are at such a distance from the printing-cylinder 2 as to establish a space through which they can easily be removed from the machine in a a duCtor-roller; means for vibrating the duc-.

tor-roller into contact with the trough-roller and distributer roller alternately; pivoted cheeks carrying the said damping, distributing, ductor and trough rollers and the trough; and means for turning the checks on their pivot to move the said rollers and trough toward and away from the printing-cylinder.

2. The combination of printing-cylinder; damping-rollers adapted to contact with the printing-cylinder; distributer-roller in contact with the damping-rollers; water-trough;

trough-roller rotatable in the water-trough;

a ductor-roller; means for vibrating the ductor-roller into contact with the trough-roller and distributer roller alternately; pivoted cheeks carrying the said damping, distributing, ductor and trough rollers; means for turning the cheeks on their pivot; a gear 00- axial with the pivotof the cheeks; means for rotating this gear; and gearing operatively connecting the said gear with the distributerroller and trough-roller respectively.

'3. The combination of printing-cylinder; damping-rollers adapted to contact with the printing-cylinder; distributer-roller in contact with the damping-rollers; pivoted cheeks carrying the said damping and distributing rollers; means for turning the cheeks on their pivot to move the said rollers toward and away from the printing-cylinder; a gear coaxial with the pivot of the cheeks; means for rotating this gear; and gearingoperatively connecting the said gear with the distributerroller.

4%. The combination of printing-cylinder; damping-rollers adapted to contact with the printing-cylinder; distributer-roller in contact withthe dam ping-rollers; a ductor-roller; means for vibrating the ductor-roller into and out of contact with the distributer-roller; pivoted cheeks carrying the said damping and distributing rollers and means; means for turning the checks on their pivot to move the said rollerstoward and away fromthe printing-cylinder; a gear coaxial with the pivot of the cheeks; means for rotating this gear; and gearing operatively connecting the said gear with the means for vibrating the ductor-roller.

v 5. The combination in a printing-machine of a water-trough; trough-roller rotatable in the water-trough; aductor-roller; means for vibrating the ductor-roller into and out of contact with the trough-roller; pivoted cheeks carrying the said trough-roller and vibrating means; means for turning the cheeks on their pivot to move the said rollers toward and away from the printing-cylinder; .a gear 00- axial with the pivot of the checks; 1 means for rotating this gear; and gearing operatively connecting the said gear with the means for vibrating the ductor-roller. 6. The combination in a printing-machine, of a water-trough; trough-roller'rotatable in the water-trough; pivoted cheeks carrying the troughand roller; means for turning the cheeks on their pivot to move the said trough, and roller toward and away from the printing-cylinder; a gear coaxial with the pivot of the cheeks; meansfor rotating this gear; and continuously rotating gearing operatively vconnecting the said gear with the troughroller, and imparting contlnuous rotary motion to the said trough-roller.

7. The combination in a printing-machine, of printing-cylinder; rocking damping mechv anism having removable damping-rollers; a cam on the shaft of the printing-cylinder; cam on the damping mechanism; bell-crank lever having its arms' normally in constant contact with the said cams respectively; and 7.95

means for moving the cam on the damping mechanism away from the respective arm of the bell-crank lever to allow the weight of y the damping mechanism to rock it away from the printing-cylinder. 8. The combination in aprinting-machine, of printing-cylinder; rocking damping mechanism having removable damping rollers; cam on the shaft of the printing-cylinder;

IOO

cam on the damping mechanism; bell crank I0 5 l lever having its arms normally in constant 7 contact with the said cams respectively; means for rocking the cam on the damping mechanism away from the respective arm of the bell-crank lever to allow the weight of the damping mechanism to rock it away from the printing-cylinder and a locking device to lock the said means out of action.

9. The combination in a printing-machine, of printing-cylinder; rocking damping mech- I I 5 anism having removable damping-rollers; cam on the shaft of the printing-cylinder; cam on the damping mechanism; bell-crank lever having its arms normally in constant contact with the said cams respectively; 12

means for moving the cam on the damping mechanism away from the respective arm of the bell-crank lever to allow the weight of the damping mechanismfto rock it away from the printing-cylinder; and stops for the damp- I25 ing mechanism to rest it during the time it is so away from the said cylinder.

10. The combination ina printing-machine,

of printing-cylinder; rocking damping meching mechanism rotating in any position of the 10 anism having. removable damping rollers; latter. means for allowing the Weight of the damp- In Witness whereof I have hereunto set my ing melehanism to rock it away fronli theprinthand in the presence of two witnesses.

5 ing-cy inder for a distance that wi 1 allow of r i r V the damping-rollers being removed; means 'UIOMAb Nohlll' for locking the last-mentioned means out of Vitnesses: action; and gearing driven by the printing- J. H. J 01', cylinder to keep all therollers of the damp- I T. R. G. PARKER. 

